Characterization of thulium doped fiber for mid infrared laser applications
Bibliographic record
Abstract
High output power sources producing output in the so-called "eye-safe" 2 m spectral region have recently shown much promise for a number of applications.The 2 m radiation produced by the 3 F 4 -3 H 6 transition of Tm 3+ has many applications in medical, commercial, and military technologies.The strong absorption of radiation at this wavelength by water and human tissues is attractive for laser surgery, while the low atmospheric and eye-safe properties make this system useful for materials processing, range-nding, remote sensing, and other applications.Generally, the Mid-Infrared (3 -5 m) spectral region is of interest and 2 m devices also provide an ideal starting wavelength.In this work, the spectral characteristics of a special Tm 3+ -doped ber, produced by a Canadian company (CorActive), is investigated.The ber is pumped with a commercially pump diode laser operating at 800 nm.The dependence of the ber's slope eciency on dierent cooling techniques is investigated experimentally.With a 4-m-long ber, 5 W multi-mode continuous wave (CW) output is generated for 20 W of absorbed power, with a slope eciency of 53.6%.A spectral output with multi-wavelengths ranging from 2.01 -2.04 m is obtained.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".